Rosemary Kennedy

Rosemary Kennedy

AP

The oldest Kennedy daughter, center, is in good spirits in June 1940 in London with sister Jean, left, and brother Jack, who would be elected president in 1960. Their father, Joseph P. Kennedy Sr., was U.S. ambassador to Britain at the time.

The oldest Kennedy daughter, center, is in good spirits in June 1940 in London with sister Jean, left, and brother Jack, who would be elected president in 1960. Their father, Joseph P. Kennedy Sr., was U.S. ambassador to Britain at the time. (AP)

The oldest Kennedy daughter, center, is in good spirits in June 1940 in London with sister Jean, left, and brother Jack, who would be elected president in 1960. Their father, Joseph P. Kennedy Sr., was U.S. ambassador to Britain at the time.